Fully unsaturated oligoquinanes comprise a class of fused five-membered ring compounds which contain extended p-systems with interesting electronic properties. This class of rigid molecules contains planar, bowl-and even ball-shaped structures, and their strain energy increases for each additionally fused five-membered ring. The first three members of this family, fulvene, pentalene and acepentalene have been synthesized or at least generated, whereas all higher members were only approached or studied by computational methods. In this review the class of fully unsaturated oligoquinanes -ranging from fulvene to C 20 -fullerene -is presented with respect to their syntheses and their properties. Also, related molecules with similar structural features will be discussed, which have not been highlighted in previous volumes of this series [1,2].